FortiAPs not connecting to Fortigate

[ej72]

Fortigate 80C v4.0,build0482,110920 (MR3 Patch 2) FortiAP 210B' s I cannot get the FortiAP to connect to the Fortigate. We have four of the 210B' s, all plugged into a POE switch. The fortigate is on the 192.168.5.x subnet and the APs are on the 192.168.31.x subnet. The APs are getting an IP from DHCP, I can ping the IP of the APs from my workstation and from the fortigate CLI. 2 of the 4 APs show up in the list of Managed FortiAP on the Fortigate, however if I Authorize each one they are forever stuck in a " Disconnected" status. The same thing happens if I connect the APs to the 192.168.5.x subnet (same as Fortigate). I have tried multiple patch cables, switches, switch ports, etc. No matter what I try 2 of the 4 APs never show up at all on the Fortigate and the other 2 show up but don' t successfully connect. Am I missing something here? This was supposed to be an easy plug-and-play setup, i.e. plug the APs into the network, Fortigate sees them and pushes down the config and you are done. Please help!

[JAMES01]

you have to activate in Vlan that you assign to the ap --> administrative access -> security fabric connection. 

that will make the fortigate recognize the ap